[x] Welcome at THunting.com!

A fun place to talk about Metal Detecting, Treasure Hunting & Prospecting. Here you can share finds and experience with thousands of members from all over the world

Join us and Register Now - Its FREE & EASY

THunting.com
Treasure Hunting & Metal Detecting Community
   
Advanced Search
*
Welcome, Guest! Please login or register HERE - It is FREE and easy.
Only registered users can post and view images on our message boards.
Did you miss your activation email?

Login with email, password and session length
Or Login Using Social Network Account
2
News:
Pages:  1 2 3 4 5 6 7 8 9 10 11 12    Go Down
Print
Share this topic on FacebookShare this topic on Del.icio.usShare this topic on DiggShare this topic on RedditShare this topic on Twitter
Tags:
0 Members and 1 Guest are viewing this topic.
Offline ahocool
Pull Tab
*

Join Date: Mar, 2012
Thank you0

Activity
0%

Indonesia
Posts: 6
Referrals: 0

30.00 Gold
View Inventory

Awards
« Reply #110 on: March 16, 2012, 08:31:55 pm »
Go Up Go Down

overnight work ....finally i have conclusion :
 
strange +5V ......must wait until the positive supply rail up from bellow 3v to up 5v ,so the7805 will give 0 output for sometime . The speaker will oscillate via 555
If 5V is achieved ( by connect the base of push pull circuit) then another bad result for CMOS IC VCC ...it give 15 Volt.....oh noooo

i think this design must consider a better way to make -+5 volt or symmetrical supply for OPAMP


Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,21018.msg216819.html#msg216819




Logged
Offline ahocool
Pull Tab
*

Join Date: Mar, 2012
Thank you0

Activity
0%

Indonesia
Posts: 6
Referrals: 0

30.00 Gold
View Inventory

Awards
« Reply #111 on: March 17, 2012, 04:51:17 am »
Go Up Go Down

UPDATE: the circuit is now working correctly ...testing with 20cm coil  and my headset scream at 50cm of blank PCB

the answer is the Xtal 32khz need to be grounded via it's casing , that is why i always need to touch the base of push pull to activate +5v 

N-Channel JFET 2n4393 is replaced with 2N3822 which is a common HAM radio amplifier

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,21018.msg216850.html#msg216850




Logged
Offline ahocool
Pull Tab
*

Join Date: Mar, 2012
Thank you0

Activity
0%

Indonesia
Posts: 6
Referrals: 0

30.00 Gold
View Inventory

Awards
« Reply #112 on: March 17, 2012, 09:37:41 am »
Go Up Go Down

finally, video link

You are not allowed to view links.
Please Register or Login

http://youtu.be/sgs6Us8PjVs


using piezo buzzer not piezo speaker....loud enough to make your dog bark !

xtal casing is connected to pin 11 of 4001 ! no luck when connected to GND

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,21018.msg216857.html#msg216857



There are 1 attachment(s) in this post which you can not view or download

Please register for viewing them.

2012-03-17 21.12.24.jpg


Logged
Offline xavier
Platin Member
*

From a rainy Brussels
Join Date: May, 2009
Thank you165

Activity
0%
Male
Belgium
Posts: 7339
Referrals: 0

32206.00 Gold
View Inventory

Awards
« Reply #113 on: March 19, 2012, 01:40:38 pm »
Go Up Go Down

Well done Ahocool looks like it's working great now all you need is a way to discriminate between ferrous and nonferrous metals 

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,21018.msg216997.html#msg216997


Xavier


Logged

So many questions so little time

Offline ahocool
Pull Tab
*

Join Date: Mar, 2012
Thank you0

Activity
0%

Indonesia
Posts: 6
Referrals: 0

30.00 Gold
View Inventory

Awards
« Reply #114 on: March 19, 2012, 08:37:35 pm »
Go Up Go Down

thank's Xavier , as i read all over the internet, PI is not for discriminate type ... VLF or TxRx is better for discriminate type

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,21018.msg217033.html#msg217033




Logged
Offline ahocool
Pull Tab
*

Join Date: Mar, 2012
Thank you0

Activity
0%

Indonesia
Posts: 6
Referrals: 0

30.00 Gold
View Inventory

Awards
« Reply #115 on: March 20, 2012, 06:09:40 am »
Go Up Go Down

my friend told me that sascho design is wrong as  NAND gate IC is not CD4001 , anyway it's works by using NOR gate....hmmm ? will testing tomorrow using CD4011(real NAND gate),.....worth to try or not?

fff ....any comment on the NAND gate and CD4001 ?

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,21018.msg217046.html#msg217046




Logged
Offline xavier
Platin Member
*

From a rainy Brussels
Join Date: May, 2009
Thank you165

Activity
0%
Male
Belgium
Posts: 7339
Referrals: 0

32206.00 Gold
View Inventory

Awards
« Reply #116 on: March 20, 2012, 01:49:35 pm »
Go Up Go Down

You can do discrimination on a PI using DSP but it's not an easy task .

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,21018.msg217082.html#msg217082


Xavier


Logged

So many questions so little time

Offline CEaton2012
Knight
Copper Member
*

New to Board, Hi everone
Join Date: Jan, 2012
Thank you1

Activity
0%
Male
United States
Posts: 59
Referrals: 0

415.00 Gold
View Inventory

Awards

White Classic 2 (20 years old still going strong)
« Reply #117 on: April 07, 2012, 10:24:12 am »
Go Up Go Down

Nice work  Cheesy

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,21018.msg219337.html#msg219337




Logged
Offline ZOUjiarui
Foil
*

Join Date: Nov, 2021
Thank you0

Activity
0%

China
Posts: 2
Referrals: 0

10.00 Gold
View Inventory
Linux
Linux
Chrome 94.0.4606.61
Chrome 94.0.4606.61

Awards
« Reply #118 on: February 07, 2022, 08:13:40 pm »
Go Up Go Down

Hello, everyone. Sorry I'm late. I am looking for a pi that will work on red soil, can anyone tell me how well it will work on red soil.
Thanks a lot.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,21018.msg334910.html#msg334910




Logged
Offline irenee1
Foil
*

Join Date: Jul, 2014
Thank you0

Activity
0%

Poland
Posts: 1
Referrals: 0

6.00 Gold
View Inventory
Windows 7/Server 2008 R2
Windows 7/Server 2008 R2
Chrome 104.0.0.0
Chrome 104.0.0.0

Awards
« Reply #119 on: August 06, 2022, 11:10:53 pm »
Go Up Go Down

It is  that DBP2010 does not have red soil in my place, so l have no way to check, but this detector has GB and cuts ferrite , greetings.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,21018.msg335388.html#msg335388




Logged
Print
Pages:  1 2 3 4 5 6 7 8 9 10 11 12    Go Up
Jump to:  

Powered by SMF 1.1.19 | SMF © 2005, Simple Machines | Sitemap
Copyright THunting.com